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olga55 [171]
3 years ago
12

Find the circumference of the

Mathematics
1 answer:
WITCHER [35]3 years ago
6 0
The answer is abc deft hi
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A plane flew 525 miles in 1.75 hours. Find the average speed of the plane.
ale4655 [162]

We are trying to find the average speed of the plane, which is mph, or \dfrac{\textrm{miles}}{\textrm{hour}}. Using proportions, we can find the average speed of the plane in mph:

\dfrac{525 \,\, \textrm{miles}}{1.75 \,\,\textrm{hours}} = \dfrac{x \,\, \textrm{miles}}{1 \,\,\textrm{hour}}

  • Use the information from the problem to create a proportion. Remember that we are looking for mph, so we will call that x.

\dfrac{525}{1.75} \,\textrm{miles} = x \,\textrm{miles}

  • Multiply the entire equation by 1 \,\textrm{hour}

\dfrac{525}{1.75} = 300 = x

  • Divide both sides of the equation by 1 \,\textrm{mile} to clear both sides of the mile unit

The average speed of the plane is 300 mph.

6 0
3 years ago
Determine the angle at the centre of a circle with radius 6.0 cm for an arc length of 8.0 cm.
sveta [45]

Answer:

Third option.

Step-by-step explanation:

You need to remember that the formula used to calculate the arc lenght is:

arc\ length=r C

Where "r" is the radius and "C" is the central angle in radians.

You need to solve for "C":

C=\frac{arc\ length}{r}

You know the radius and the arc lenght, therefore, you can substitute values to calculate the central angle in radians. Therefore, this is:

C=\frac{8.0cm}{6.0cm}

C=\frac{4}{3}radians

4 0
3 years ago
What is 66 tens - 30 tens
jek_recluse [69]

Answer:

66

-30

___

36

Step-by-step explanation:

The answer is 36 do 66 minus 36.

4 0
2 years ago
What is the image of the point (-1,-3)(−1,−3) after a rotation of 90 degrees counterclockwise about the origin?
ycow [4]

Answer:

(3,-1)

Step-by-step explanation:

6 0
3 years ago
Find the distance across the lake. Assume the triangles are similar.
irina1246 [14]

Answer:

a

Step-by-step explanation:

4 0
3 years ago
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